If you refer to most dictionaries, sincerity means the virtue of one who speaks and acts truly about his or her own feelings, thoughts, and desires. In Islam, sincerity is described as a manner of giving or doing something without hoping for any change or advantages. When we combine these two definitions, it will be giving or doing something truly with our own desire and feelings without wanting any change. Making it easy, it is defined as an act of giving help that comes deep in the heart. The Oxford English Dictionary and most scholars state that sincerity from sincere is derived from the Latin sincerus meaning clean, pure, sound (1525–35). Sincerus may have once meant "one growth" (not mixed), from sin- (one) and crescere (to grow). Crescere is cognate with "Ceres," the goddess of grain, as in "cereal."
Though its difficult yet impossible to see people give out donation sincerely, as the current young generation, we must turn this paradigm to its normal. We still have time and we still can make the change. Ending this post, let us pray that Allah will help us in all our good efforts. :)