The thought occurred to me that folks are always asking “Give me a number” “How much should I give” from their pastors or spiritual leaders. When answered with a number, 10%, $50 per week, or whatever, it then becomes a contract or pledge with that person or group. It should be in my opinion a point of contact with my living Lord. An act of worship that is guided by Him and the resources He has given me. If I make a pledge with you then I am happy when I fulfill my pledge. If I give to God out of a heart of love I am never satisfied with my amount as I learn more of His gift to me.
John Piper has a sermon where he mentions three cases when the NT speaks about money. The rich young ruler, sell everything and give. Sell a field and give. Sell your possessions and give. Piper's sermon, magnifying-god-with-money
John Wesley is often quoted as saying “Earn as much as you can, save as much as you can, give as much as you can.” If it truly is more blessed to give than receive then we have to challenge our tendency to horde possessions and money. If love is the mark of a Christian it follows so must be generosity.