The greatest essence in investigating the scriptures is so that we can profit from it (Romans 15:4) i.e the hope, comfort, patience, revelation, and edification that searching of scriptures gives, will truly be ours (John 6:63; Psalms 119:162).
The word of God itself is profitable, however, there are principles that helps in maximizing the profit of scriptures (1Timothy 4:15; Mark7:13).
The word of God can be compared to three things: (i) nutrition i.e you eat it (ii) medication - you study it day and night as prescribed in the bible (iii) exercise (1Corinthians 3:1-2; Psalms 1:2).
Ultimately, the Bible is meant for heart consumption; we cannot profit until the scriptures enters our heart (Psalms 119:11). Profit comes by repetitive learning of the scriptures, it must be done consistently (Matthew 4:4; Joshua 1:8).
The three pointers to the scriptures, which will make it profitable unto us, are that:
(1). In order for our heart to be rich in scriptures and be profitable from it, we must ensure that every channel that supplies the soul must be what God's word can penetrate through (Colossians 3:16).
(2) Removing what chokes the word is what brings profit (Matthew 13:18-22).
(3) Being the doer of the word brings profit (James 1:22-25).