God is faithful, by whom you were called into the fellowship of His Son, Jesus Christ our Lord. (1 Corinthians 1:9 NKJV)
God is always faithful so we should be faithful to Him. He never leaves us or forsakes us. We have to guard against the things that make us question His faithfulness:
1 – When we don't see answers to our prayers right away.
We can begin to question God's faithfulness when we are praying and don't see results. We begin to question whether God will be faithful.
2 – When we begin to follow our emotions.
Our feelings can get the best of us.
3 – When we are constantly around negativity.
If we are around negativity all the time we can be paralyzed from accepting that He is faithful. We begin to believe the negative instead of the truth.
We need to guard our hearts from the the things that will keep us from believing in God's faithfulness. Fight the good fight of faith to believe that He is faithful.