Carl Jung: So don’t play the missionary. Don’t try to eat the goods of others.

If you discover what you call a truth, you should test it, try to eat it.

If it feeds you it is good, but if you cannot live by it and only assume it ought to feed other people, then it is bad.

The real test is that your truth should be good for yourself. Not one dog is coming to sniff at it if it doesn’t feed yourself.
If you are not satisfied with it, if you cannot enjoy it for twenty, fifty years, or a whole lifetime, it is no good.

If you are hungry, if you think your companions must be redeemed, and that they must be grateful to you on top of all, then you make a mistake: you may know the idea is no good.

So don’t play the missionary.

Don’t try to eat the goods of others.

Let other people belong to themselves and look after their own improvement: let them eat themselves.

If they are really satisfied, then nobody should disturb them.

If they are not satisfied with what they possess, they will probably seek something better; and if you are the one who has the better thing, they will surely come and get it from you. Carl Jung, Zarathustra Seminar, Pages 213-214.