I was reading my copy of My Utmost for His Highest today and the topic was on theology of all things.let me give you the ESV version of that verse first. So Jesus said to them, “The light is among you for a little while longer. Walk while you have the light, lest darkness overtake you. The one who walks in the darkness does not know where he is going. John 12:35 ESV So what is Jesus telling us in this verse?
Basically to apply knowledge we glean in our lives when we learn of it. and he wants us to learn it! Philippians 4:8-9 states: 8 Finally, brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things. 9 What you have learned and received and heard and seen in me—practice these things, and the God of peace will be with you.
Philippians tells us we should pursue what is right, true, honorable, just, pure, lovely, and commendable.That's no tiny list of adjectives there. but Jesus warns if we don't apply what we have learned it will mean nothing.
Oswald Chambers expounds upon it much better then I can. "The second you waive the question of sanctification or upon which any other thing upon which God gave you life, you begin to get dry rot in your spiritual life. Continually bring out the truth into actuality; work it out in every domain, or the very light you have will prove a curse." It's not enough to just learn it, you have to live it. To apply it. Oswald continues saying: "If you say you are sanctified, show it. The experience must be so genuine that it is shown in the life."
That is the true purpose of theology, but unless we live it, we're no better then the Pharisees holding on to our knowledge like it is the thing that saves us. A commentator showed me I should elaborate on this, It is not our application of theology that saves us, only the grace of God can do so but we must avoid thinking as if our own knowledge and actions can save us.
