Q. If God is love, then why does He allow evil?
A. Because God is Love, HE created man in His own image in order to extend the communion of love, that exists in the Trinity, to us. God wants us to choose to love Him, not be compelled to obey Him. In order for man to love God freely God gave man free will. He is just and will not deprive man of this free will. Man cannot be free to love and obey God, without being free to reject Him and rebel against Him.
Even God, if He wants men to be free cannot take from them the power to choose evil. If He enforces goodness, He takes away freedom. If He leaves freedom, He permits evil, even though He forbids it. It is man’s dignity that he is master of his own destiny instead of having to develop just like a tree which necessarily obeys natural law.
Men, as a matter of fact, misused their freedom, and sin and brutality resulted. But, it was impossible to give man the gift of freedom and the dignity of being master of his own destiny without risking the possibility that men would sometimes choose evil. (Radio Replies Vol. 1, p 4)
Q. What is the destiny we are supposed to choose using our free will?
A. Heaven or Hell. Eternal Joy or Eternal Misery. Our life in this world has many joys and many sorrows but none of those are the purpose of our life. The purpose of this life is to praise, love, and serve God so that we can attain eternal life with God in Heaven. Our earthly life is short compared to eternity and yet what we do with it determines our eternal destiny. We must use our free will to save our souls.