Psalm 16:7, Reigns/heart/kidneys instruct me. Is this a reference to our “gut feelings” and our need to trust them? Night seasons is a Hebraism or biblical poetic of saying “difficult time of darkness, confusion, indecision, and uncertainty.” This may be one way the Set-Apart Spirit directs us is through our inner or deep conscience. In reference to the Set-Apart Spirit, Yeshua said that out of our bellies will flow living waters (John 7:37–38). The Hebrew word navi often translated as “prophet” can, according to some lexicologists (e.g., Gesenius), mean “to bubble up” in an almost ecstatic sense, presumably under the influence of the Spirit of Elohim. If this is the true meaning of the word, then perhaps there is some connections between the gut instructing one, living waters flowing from one’s belly, and the word of YHVH bubbling up prophetically out of one’s belly. 

Psalm 16:8, I have set YHVH always before me. What is before my face? What are the most important things in my life? What gods or idols have I set up before me that have captivated my attention, demand my time, dictate the where I go and what I do ahead of Yehovha Elohim the one and only true God? If we will stop for a moment and listen to it, our heart or conscience will instruct or even convict us of where our true allegiances are, who or what is before us, and who the god of our life really is (v. 7).

The heart is deceitful above all things, and desperately wicked: who can know it? I YHVH search the heart, I try the reins, even to give every man according to his ways, and according to the fruit of his doings. (Jer 17:9–10)

Son of man, these men have set up their idols in their heart, and put the stumblingblock of their iniquity before their face: should I be enquired of at all by them? Therefore speak unto them, and say unto them, Thus saith the Lord YHVH; Every man of the house of Israel that setteth up his idols in his heart, and putteth the stumblingblock of his iniquity before his face, and cometh to the prophet; I YHVH will answer him that cometh according to the multitude of his idols; That I may take the house of Israel in their own heart, because they are all estranged from me through their idols.Therefore say unto the house of Israel, Thus saith the Lord YHVH; Repent, and turn yourselves from your idols; and turn away your faces from all your abominations. For every one of the house of Israel, or of the stranger that sojourneth in Israel, which separateth himself from me, and setteth up his idols in his heart, and putteth the stumblingblock of his iniquity before his face, and cometh to a prophet to enquire of him concerning me; I YHVH will answer him by myself: And I will set my face against that man, and will make him a sign and a proverb, and I will cut him off from the midst of my people; and ye shall know that I am YHVH. (Ezek 14:3–8)

Because they despised my judgments, and walked not in my statutes, but polluted my sabbaths: for their heart went after their idols. (Ezek 20:16)