DEUT731 We are forbidden to fail to aid the poor. If you are able to aid someone who is poor and you fail to do so, you violate a Torah prohibition. (Chinuch 478). If a person closes his eyes from giving charity, it is as if he has committed idolatry. (Ksubos 68a). You must take care to give charity to the poor because failure to do so immediately could cause the death of that person, as was the case with Nochum, ish gam zu. (Yorah Daiah 247:1) [See Taanis 21a] ... If a person realizes that all of his faculties are given to him for one purpose, to fulfill the will of God, he will gladly share all that he possesses with others. This applies to both his wealth and his knowledge. (Introduction to Shaarey Yoshor).