Jeremiah has these nuggets of absolute gold written in there. Here are some of my favorites:
5:7-15 How shall I pardon thee for this? thy children have forsaken me, and sworn by them that are no gods: when I had fed them to the full, they then committed adultery, and assembled themselves by troops in the harlots' houses. They were as fed horses in the morning: every one neighed after his neighbour's wife. Shall I not visit for these things? saith the LORD: and shall not my soul be avenged on such a nation as this? Go ye up upon her walls, and destroy; but make not a full end: take away her battlements; for they are not the LORD'S. For the house of Israel and the house of Judah have dealt very treacherously against me, saith the LORD. They have belied the LORD, and said, It is not he; neither shall evil come upon us; neither shall we see sword nor famine: And the prophets shall become wind, and the word is not in them: thus shall it be done unto them. Therefore thus says the LORD God of hosts: “Because you speak this word, Behold, I will make My words in your mouth fire, And this people wood, And it shall devour them. Lo, I will bring a nation upon you from far, O house of Israel, saith the LORD: it is a mighty nation, it is an ancient nation, a nation whose language thou knowest not, neither understandest what they say. Their quiver is as an open sepulchre, they are all mighty men. And they shall eat up thine harvest, and thy bread, which thy sons and thy daughters should eat: they shall eat up thy flocks and thine herds: they shall eat up thy vines and thy fig trees: they shall impoverish thy fenced cities, wherein thou trustedst, with the sword. “Nevertheless in those days,” says the LORD, “I will not make a complete end of you. And it shall come to pass, when ye shall say, Wherefore doeth the LORD our God all these things unto us? then shalt thou answer them, Like as ye have forsaken me, and served strange gods in your land, so shall ye serve strangers in a land that is not yours."
7:18-19 The children gather wood, the fathers kindle the fire, and the women knead dough, to make cakes for the queen of heaven; and they pour out drink offerings to other gods, that they may provoke Me to anger. Do they provoke me to anger? saith the LORD: do they not provoke themselves to the confusion of their own faces?
31:31-34 Behold, the days come, saith the LORD, that I will make a new covenant with the house of Israel, and with the house of Judah: Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the LORD: But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people. And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.
31:35 Thus saith the LORD, which giveth the sun for a light by day, and the ordinances of the moon and of the stars for a light by night, which divideth the sea when the waves thereof roar; The LORD of hosts is his name:If those ordinances depart from before me, saith the LORD, then the seed of Israel also shall cease from being a nation before me for ever.
The meaning of Jeremiah is pretty plain- "Thou shalt have no other gods before Me".
The beauty of Jeremiah comes from the language as he describes the mercy of God. There is mercy as we obey God and as we repent, of course. There is also mercy from God as we sin but that won't last forever. The part in chapter 5 " Lo, I will bring a nation upon you from far, O house of Israel, saith the LORD: it is a mighty nation, it is an ancient nation, a nation whose language thou knowest not, neither understandest what they say. Their quiver is as an open sepulchre, they are all mighty men."
There is more in heaven and earth and the universe than we know or comprehend, but God knows everything and protects us here on this little planet we call home. We take for granted the space given us for repentance. We take for granted the mercy of God by which we live day to day whether we are good or bad, but at some point God will acquaint us with more than we currently know and we will realize how great His mercy has been.