We do not need to proselytise either by our speech or by our writing. We can only do so really with our lives. Let our lives be open books for all to study.
The only way to get love is to be lovable. It's very irritating if you have a lot of money. You'd like to think you could write a check: "I'll buy a million dollars' worth of love." But it doesn't work that way. The more you give love away, the more you get.
The test of any good fiction is that you should care something for the characters; the good to succeed, the bad to fail. The trouble with most fiction is that you want them all to land in hell, together, as quickly as possible.
Try and write straight English; never using slang except in dialogue and then only when unavoidable. Because all slang goes sour in a short time. I only use swear words, for example, that have lasted at least a thousand years for fear of getting stuff that will be simply timely and then go sour.
Christ is the most unique person of history. No man can write a history of the human race without giving first and foremost place to the penniless Teacher of Nazareth.