Words ... why are some words so difficult?

 Words ... they are just words ... then why do I struggle over approve and successful ... 

Merriam-Webster's definition of approve is "officially agree to or accept as satisfactory." Do I not agree with that statement? Do I not feel my life is satisfactory. On the outside I do, but on the inside do I feel something else? I have never been one to dive deep into internal feelings, but maybe now is the time? Could there be some truth to if you believe it you will achieve it?

Merriam-Webster's definition of  successful is "resulting or ending well or in success; gaining or having gained success." Looking at my "lifetime" resume most would say I have been successful, but why can't I believe it?

I will continue to recite my daily self talk and see if these two words come any easier.