Prayer is not a hard requirement - it is the natural duty of a creature to its creator, the simplest homage that human need can pay to divine liberality.
Charles SpurgeonBut you are not under a system similar to that by which the Jews were obliged to pay tithes to the priests. If there were any such rule laid down in the Gospel, it would destroy the beauty of spontaneous giving and take away all the bloom from the fruit of your liberality! There is no law to tell me what I should give my father on his birthday. There is no rule laid down in any law book to decide what present a husband should give to his wife, nor what token of affection we should bestow upon others whom we love. No, the gift must be a free one, or it has lost all its sweetness.
Charles SpurgeonSufficient for the day is all that we can enjoy. We cannot eat or drink or wear more than the day's supply of food and raiment; the surplus gives us the care of storing it, and the anxiety of watching against a thief. One staff aids a traveller, but a bundle of staves is a heavy burden. Enough is not only as good as a feast, but is all that the greatest glutton can truly enjoy. This is all that we should expect; a craving for more than this is ungrateful. When our Father does not give us more, we should be content with his daily allowance.
Charles SpurgeonWe would labor earnestly to raise a believer in salvation by free will into a believer in salvation by grace, for we long to see all religious teaching built upon the solid rock of truth and not upon the sand of imagination. At the same time, our grand object is not the revision of opinions, but the regeneration of natures. We should bring men to Christ, not to our own particular views of Christianity.
Charles Spurgeon