Graham Greene said this quote

For if this God exists, I thought, and if even you – with your lusts and your adulteries and the timid lies you used to tell – can change like this, we could all be saints by leaping as you leapt, by shutting the eyes and leaping once and for all: if you are a saint, it’s not so difficult to be a saint. It’s something He can demand of any of us, leap.