Today’s Scripture reading is Acts 18:23-25.
Verse 24 - "...and mighty in the scriptures,"
There are numerous areas of the our Christian walk that require a mightiness.  These areas would more than likely be listed below what was written of Apollos.  He was "mighty in the scriptures."  I would encourage you to read the rest of Acts 18 as more is said of Apollos and his relationship to the scriptures.  
The Word of God made us aware of our need to be born again.  The Word of God is a weapon we need to be good at using in spiritual warfare.  We receive spiritual food from the Word of God that provides strength to stand against the temptation of the enemy.  What Bible verse did God give you today?
Apollos left us a testimony worth following...Mighty in the Scriptures!