The four blocks she mentions are Critisism,Fear,Guilt,and Resentment. So let's take a little look at how each of these play out in our creative lives....and while I'm writing for musicians,this applys to any and all creative genres. So if you know a fellow artist in a different medium,by all means share this with them.
Perhaps the biggest block I see in students & other musicians in general is dealing with critisism. Usually this stems from a domineering or authoritive figure who gave negative feedback to you when practicing your instrument growing up. Sometimes this comes from a well intentioned but impatient music teacher. It can place in the mind a sense of low self esteem when it comes to one's musical/artistic abilities which one can unconsciously carry as emotional baggage into adulthood and throughout their musical adventures. Take a look back and see what you remember. Also remind yourself that you are now an adult,and in charge of your own mind. If you find that a there's a weight there stemming from a relative or music teacher over a hurtful comment or making fun of your playing,release it now,and let it go. Affirm that you are a noteworthy musician,and are not affected by your past.
Next would be fear,usually fed by what I wrote above. Our inner critic/Ego mind loves to take terrifying images conjured up in our imagination and really make terrifying mind movies out of them. This is where stage fright comes from in addition to isolating ourselves from others when it comes to making our music. Take a look at your musical fears. They're not based in reality,are they? Time to release those,too.
Guilt is among the biggest blocks to the musician who gave up their instrument and want to return to it,but as yet,haven't. The inner critic has a ball with this one. It'll throw things in your face like the money you spent on lessons and didn't keep up on.(furthering your hesitancy to pick up your instrument again) or even in picking up or even looking at the instrument by. taking it out of it's case. This is especially true if you live or are close to someone who purchased that instrument for you as a gift,and you haven't picke it up in weeks or months. Realize it's your Ego mind keeping you from playing,that there's nothing to feel guilty about,and in fact when you start practicing again the guilt will melt away like snow in the spring,cause it wasn't real to begin with. In fact,people do this with themselves when they're the ones that purchased the instrument for themselves.
And last but not least,resentment. This can come from a lot of different directions,depending on the experiences of the musician. There can be resentment over toxic playmates,(been there,done that) ie fellow musicians who weren't good for you,resentment over people not taking your music seriously,not winning the audition,Aunt Sally not appreciating your playing,and so on & so forth. You get the idea. Remember in all these cases,(and you could be dealing with more than one of the four blocks I mention here) it's the Inner Critic/ego mind that's playing with you.
It's scared to death you could become a great well known locally musician,that you might record that CD,start busking,etc. It's job is to keep you small and unknown. So it plays with these four blocks a lot to keep you there,and the ones from childhood can be the hardest to undo,cause they've been with you for years.
How to undo this? One- journal your feelings down on paper. Vent. Release it. See it for what is is & let it go. Catherine Ponder has some wonderful books on healing,prosperity,and moving forward with your life,as does Louise Hay,Julia Cameron,and Wayne Dyer. As far as recent books,I love "#HigherSelfie" and "It's Never Too Late To Begin Again". These books can be found in e versions or you can get them used.
The most important thing you can do is to learn to love and nurture your inner self. That's a toughie for most,because loving and accepting yourself as you are now is so discouraged in our modern society. Personally my Mom would've freaked out on this very concept.
My childhood was filled with criticism,getting frequent reminders that I wasn't "good enough",wasn't "ready" and even bullying from my Mom about my wanting to be a professional musician when I was a teenager. She was very much an overcontroller when it came to my sprouting wings and wanting to go on my own,and she really knew how to hit my buttons. As a result it was ingrained me not to love myself,not to honor myself,nor respect or be grateful for my creative talants. In recent years,I have looked back and realised that my Mom raised me the best she knew how,Lord knows where her parenting skills came from,and that I chose my parents for this lifetime and knew this is what I was in for.
The most healing thing one can do for themselves is to love and accept themselves. In this,I would heartily recommend the book "Life Loves You" by Louise Hay and Robert Holden. There's also a wonderful deck of affirmation cards that go with the book (a seperate purchase) If you can only get one book,get this one first,and the deck of cards if you can.
I can promise you that if you start to let go of these four blocks and replace them with self love and affiirmations,you will feel lighter,more inspired,and more creative. And that's just the beginning.