"When you are in distress, and all these things come upon you in the latter days, when you turn to the LORD your God and obey His voice (for the LORD your God is a merciful God), He will not forsake you nor destroy you, nor forget the covenant of your fathers which He swore to them." Deuteronomy 4.30-31In every promise there is a condition for compliance. Sometimes, because we are more emotional, we let the voice of the heart speak louder and despair at the sight of problems.
God is the Same. Just as He was in the past, He is in the present and will be in the future, forever. When we turn to Him and heed His voice, we reason, and He sustains us.