Sometimes people will let us down in one way or another, but there is one who we can put our full trust (faith) in which is God our Father and Christ our Lord who is always faithful. The promises God made to those who were about to enter the Promised Land is the same God we serve today and He is faithful to those who love and obey Him! (Deuteronomy 7:6-9). For thou art an holy people unto the Lord thy God: the Lord thy God hath chosen thee to be a special people unto himself, above all people that are upon the face of the earth. The Lord did not set his love upon you, nor choose you, because ye were more in number than any people; for ye were the fewest of all people: But because the Lord loved you, and because he would keep the oath which he had sworn unto your fathers, hath the Lord brought you out with a mighty hand, and redeemed you out of the house of bondmen, from the hand of Pharaoh king of Egypt. Know therefore that the Lord thy God, he is God, the faithful God, which keepeth covenant and mercy with them that love him and keep his commandments to a thousand generations;
We can be sure that even when we are being tempted there is nothing we will be overtaken by for God is faithful to always give us a way to escape. (1 Corinthians 10:13). There hath no temptation taken you but such as is common to man: but God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.