Men who are in comparative poverty are usually the ones who do the most to sustain the cause of God. They are generous with their little. They have strengthened their generous impulses by continual liberalities. When their expenditures pressed close upon the income, their passion for earthly riches had no room or chance to strengthen. CS 221.3
But many, when they begin to gather earthly riches, commence to calculate how long it will be before they can be in possession of a certain sum. In their anxiety to amass wealth for themselves, they fail to become rich toward God. Their benevolence does not keep pace with their accumulation. As their passion for riches increases, their affections are bound up with their treasure. The increase of their property strengthens the eager desire for more, until some consider that their giving to the Lord a tenth is a severe and unjust tax. Inspiration has said, “If riches increase, set not your heart upon them.” Many have said, “If I were as rich as such a one, I would multiply my gifts to the treasury of God. I would do nothing else with my wealth but use it for the advancement of the cause of God.” God has tested some of these by giving them riches; but with the riches came the fiercer temptation, and their benevolence was far less than in the days of their poverty. A grasping desire for greater riches absorbed their minds and hearts, and they committed idolatry.—Testimonies for the Church 3:403. CS 221.4
Some, when in poverty, are generous with their little; but as they acquire property, they become penurious. The reason they have so little faith, is because they do not keep moving forward as they prosper, and give to the cause of God even at a sacrifice.—Testimonies for the Church 4:77. CS 222.1