Paul speaks about having determined purpose. He knew his purpose, and was firmly set in his decision and course of action.

His purpose was settled for him 👉 to know God more.

“[For my determined purpose is] that I may know Him [that I may progressively become more deeply and intimately acquainted with Him, perceiving and recognizing and understanding the wonders of His Person more strongly and more clearly], and that I may in that same way come to know the power outflowing from His resurrection [which it exerts over believers], and that I may so share His sufferings as to be continually transformed [in spirit into His likeness even] to His death, [in the hope]”
‭‭Philippians‬ ‭3:10‬ ‭AMPC‬‬