Isaiah 41:10: Why Should I Trust God?
Fear not, for I am with you;
be not dismayed, for I am your God;
I will strengthen you, I will help you,
I will uphold you with my righteous right hand.
Trusting God can be difficult. We do not physically see Him. When we pray we do not get audible responses. Why should we trust the Trinity? Isaiah 41:10 explains why.  The promise “I am with you” is the foundation we need to endure all of life and battle every temptation.  This foundation is trustworthy because the Lord Who spoke the world into being  promises “I will help you” in trials and tests. The reminder that the Triune God’s righteous right hand upholds us is a reminder of His “equity” and “fidelity . . . in persevering his people.”  Believers in Christ are to trust God because He is the faithful, true, and sure foundation for every situation.
But there is more: God is with us in the person of Christ.  When we embrace Jesus by faith as He is presented in the Gospel, we are promised that the Trinity “will never leave [us] nor forsake [us.]”  Why should we trust God? Because He is the just and faithful foundation Who has paved the way of salvation for us in Christ. 
 John Calvin. Commentary on the Prophet Isaiah, Vol. 3. Trans. William Pringle. (Grand Rapids, MI: Baker Book House Co, 1981), 258.
 Calvin, Commentary on the Prophet Isaiah, Vol. 3, 258.
 Genesis 1-2.
 Calvin, Commentary on the Prophet Isaiah, Vol. 3, 259.
 Matthew 1:21-21.
 Joshua 1:5-9; Romans 8:28-39; Hebrews 13:5-6.
 John 3:16, 14:6; Acts 4:12; Ephesians 1:3-2:14.