Jer 1:11-12, 11 And the word of the LORD came to me, saying, “Jeremiah, what do you see?” And I said, “I see an almond branch.” 12 Then the LORD said to me, “You have seen well, for I am watching over my word to perform it.”
These two verses make sense after looking at the call and consecration of Aaron as a priest unto God. God instructed Moses to gather rods/staffs from leaders of the 12 tribes (Num 17:5) and put them in the tent of testimony. The following day, just “…the staff of Aaron … sprouted and put forth bud and produced blossoms, and it bore ripe almonds ”, (Num 17:8).
Aaron and Jeremiah by the grace of God were quick to be fruitful, defying periods of trees characteristic development. God was showing him that He was able to do the impossible in his life and quickly. This also showed that God defies all the inadequacies and achieves what He has purposed. God says, “I am watching over my word to perform it.” He will faithfully keep His word in the calling and fulfilling.
Notice that God did not call Jeremiah to resemble other prophets. We frequently want to wait until we feel able before we can trust God to use us. From personal experience, I can affirm that God utilizes willing hearts notwithstanding their impediments. Your availability is key; God takes care of the ability. John 5:17“But Jesus answered them, “My Father has been working until now, and I have been working.” That is working in forming, filling, and utilizing the vessels for every good works.