Many people struggle with their faith.  If this is you, then it might be because of doubt.  

Jesus said to Peter when he came to Him on the water and started to sink, “O you of little faith, why did you doubt?” Mathew 14:31.  Peter went out in faith to Jesus, yet when he took his eyes off Him, he started to sink.   

Doubt is the initial approach of Satan.  When he came to Eve and to Jesus, he asked them questions to make them doubt.   Do not entertain the enemy’s tactics.  Stand on God’s word and keep your eyes on Jesus.