"Call on Me when you are in trouble, I will deliver (rescue) you, and you will give me glory." Psalm 50:15
The promise from God to deliver you in not conditional, but He does tell you how to display gratitude. This is an unconditional promise, but your response to it determines how affective it is in your life. When you call out to God you show some level of faith. It may be a last resort, but everyone starts somewhere. The point is that God is wherever you are. He is meeting you where you are ready to meet Him. He loved you even when you were His enemy.
Asaph recorded this promise maybe in a lesson format or maybe for his own personal reference to life. He was a leader of worship under King David. He knew the kings heart, so he found the freedom to worship God in a way that really glorified Him. The message behind the promise is a reminder of what true worship is all about. True worship reveals a heart that belongs to God. It reveals how much you trust God.
To call upon God is to pray. It does not matter how big or small your problem is, God will deliver you from what is hurting you or causing you stress. You only need to believe that He will and listen to His direction to get out of the situation. God is listening and He will deliver you from all kinds of evil.
The promise is God's response to your prayer. It is proof that He is there and listening to you. The rescue is the proof that He always keeps His Word. God cannot lie. It is not based on how good you are or even if you are a Christian. God wants a real relationship with you. He knows that this may be door for that. You may still reject Him after the fact, but it does not change who He is: good, righteous, true.
Your response to God's deliverance reveals your heart and character. If you give God the glory, then you are praising Him. It reveals a humble heart that recognizes a good thing when it comes around. If you do not recognize God at all it reveals a hard and prideful heart. The character revealed is someone who may resent help, dismiss help, or so prideful that they never realized how much help they actually needed. It is better for you to choose to follow God. He will make you honest and give you a true character that reflects Him. It is a life of honor that comes from God.
Job 22:27, Psalm 22:23, 50:15, 91:15, 107:6-28, & Zechariah 13:9