You can't know, you can only believe - or not.

Faith is the art of holding on to things your reason has once accepted in spite of your changing moods

faith is the art of holding on to things in spite of your changing moods and circumstances.

You cannot go on 'explaining away' for ever: you will find that you have explained explanation itself away. You cannot go on 'seeing through' things for ever. The whole point of seeing through something is to see something through it.

I know now, Lord, why you utter no answer. You are yourself the answer. Before your face questions die away. What other answer would suffice?

Faith, in the sense in which I am here using the word, is the art of holding on to things your reason has once accepted, in spite of your changing moods.