Our God is faithful to do what he has predestine to do in our lives.
Even when things appears naturally, to be going in the opposite direction of his spoken word in our lives - our faith continuing without wavering in God is what will take us through unto the promise set before us by prophecy.
There isn't a question rather God is faithful, the question is, are we faithful? Faithful in our trust in our God, to continue to walk in love and having "our hearts sprinkled from an evil conscience" is what determines our destination in Christ. We should not pretend that we believe in order to impress others. Our hearts are continually examined by God and our Lord and savior Jesus. Live according to the word of God and not by our surrounding circumstances.
I Thess. 5:24 Faithful is he that calleth you, who also will do it.
I Cor. 1:9 God is faithful, by whom ye were called unto the fellowship of his Son Jesus Christ our Lord.
II Thess. 3:3 But the Lord is faithful, who shall stablish you and keep you from evil.
Let us remain faithful in our hearts toward our Lord Jesus and to continue to live by faith of the Son of God. "The just shall live by faith".