My favorite is Jeremiah 20:9
ט וְאָמַרְתִּי לֹא-אֶזְכְּרֶנּוּ, וְלֹא-אֲדַבֵּר עוֹד בִּשְׁמוֹ, וְהָיָה בְלִבִּי כְּאֵשׁ בֹּעֶרֶת, עָצֻר בְּעַצְמֹתָי; וְנִלְאֵיתִי כַּלְכֵל, וְלֹא אוּכָל. 9 And if I say: 'I will not make mention of Him, nor speak any more in His name', then there is in my heart as it were a burning fire shut up in my bones, and I weary myself to hold it in, but cannot.