Passage
How precious to me are your thoughts, God! How vast is their sum!
How precious to me are your thoughts, God! How vast is their sum!
Psalms 139:15 My frame wasn’t hidden from you, when I was made in secret, woven together in the depths of the earth.
Psalms 139:16 Your eyes saw my body. In your book they were all written, the days that were ordained for me, when as yet there were none of them.
Psalms 139:17 How precious to me are your thoughts, God! How vast is their sum!
Psalms 139:18 If I would count them, they are more in number than the sand. When I wake up, I am still with you.
Psalms 139:19 If only you, God, would kill the wicked. Get away from me, you bloodthirsty men!
The verse centers on "precious", "thoughts", and "vast". It is saying that the verse draws attention to "precious" and "thoughts", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "Your eyes saw my body In your..." into verse 18's "If I would count them they are...", so "precious" and "thoughts" belong inside that flow. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "precious" and "thoughts" with trust shaped by these words, not by a vague optimism outside the passage.