On knowing if you’ve found your vocation:
We know when we are following our vocation when our soul is set free from preoccupation with itself and is able to seek God and even to find Him, even though it may not appear to find Him. Gratitude and confidence and freedom from ourselves: these are signs that we have found our vocation and are living up to it even though everything else may seem to have gone wrong. They give us peace in any suffering. They teach us to laugh at despair. And we may have to.
Thomas Merton, No Man is an Island, Ch.8 Sec.9