"Do not be conformed to this world....But be transformed by the (entire) renewal of your mind - by its new ideals and its new attitude - so that you may prove (for yourselves) what is the good and acceptable and perfect will of God" (Rom. 12:2).
The renewal of our mind results in our beginning to think as the Lord thinks and to view situations and people as He views them. Paul's mind was so renewed that he could dare to say that he had the mind of Christ and that he no longer looked at people from a merely human point of view (1 Cor. 2:16; 2 Cor. 5:16). His prayer for the Colossian believers was that they too might be thus transformed - "We are asking God that you may see things, as it were, from His point of view by being given spiritual insight and understanding" (Col. 1:9- JBP).
Such a transformation of our minds will enable us to know what pleases God and what does not please Him, and thus we shall be able to discern His will easily in the different situations we face. God's promise to us in this New Testament age is, "This is the new agreement (covenant)....I will write My laws in their minds so that they will know what I want them to do without My even telling them.....I will write My laws into their minds so that they will always know My will" (Heb. 8:10; 10:16-TLB).
Such a renewal will give us an understanding not only of God's will, but also of His method and of His purpose - we will know, not only what God wants us to do, but also how He wants us to do it, and why. Doing the will of God can be drudgery if we do not appreciate God's purposes. When we do appreciate them, the will of God becomes for us what it was to Jesus - a delight. It is because of our ignorance of God's nature that we fear His will. If we knew Him better, we would rejoice to do His every bidding.
How can our minds be renewed? A wife living close to her husband in heart-companionship comes to know more and more of his mind and of his ways as the years go by. The same applies to the believer and his God. The new birth is like a marriage with the Lord Jesus. We should go on from that point to walk in close fellowship with the Lord, conversing with Him day by day.
We must also let Him speak to our hearts daily, both through His Word as well as through the discipline of trials that He sends into our lives. Thus we shall find ourselves growingly conformed to the image of our Lord (2 Cor. 3:18). If we neglect daily meditation on God's Word and prayer-fellowship with the Lord, we will find it extremely difficult to ascertain God's mind. Meditation on God's Word can straighten our warped and crooked ways of thinking and make us spiritually minded and sensitive to God's Voice.
We can recognise the Lord's voice only by becoming accustomed to hearing it. A new convert once asked a mature servant of God why it was that though Christ had said, "My sheep know My voice", yet he could not hear the Lord's voice. The servant of God replied, "Yes, it is true that His sheep know His voice, but it is also true that the lambs have to learn to recognize it."
A son identifies his father's voice easily only because he has heard it so often. Even so, it is only by constantly listening to the voice of the Lord, that we will be able to distinguish it above the din and clamour of other voices that will ring in our minds when we seek God's will. If you are habituated to listening to the Lord's voice, then in times of emergency, His promise is, "Your ears shall hear a word behind you saying, This is the way, walk in it; when you turn to the right hand and when you turn to the left" (Isa. 30:21).