Professor and author C. S. Lewis said most human beings sell themselves short in this life when they could have so much more. Wrote Lewis,

We are half-hearted creatures, fooling about with drink and sex and ambition when infinite joy is offered us, like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at sea. We are far too easily pleased.[1] 

[1] C. S. Lewis, The Weight of Glory, https://www.goodreads.com/work/quotes/1629232-the-weight-of-glory,  accessed February 21, 2021.