Moses said to the LORD, "O Lord, I have never been eloquent, neither in the past nor since you have spoken to your servant. I am slow of speech and tongue."The LORD said to him, "Who gave man his mouth? Who makes him deaf or mute? Who gives him sight or makes him blind? Is it not I, the LORD ? Now go; I will help you speak and will teach you what to say."

Exodus 4:10-12

Why are we trying to measure our own ability when it's all about God's ability and capability? Sometimes we are just like Moses trying to give so many excuses but when God has called, all we need is just complete obedience, saying

"Yes, God. Send me!"