Philippians 2:5-11 (New International Version)
5 Your attitude should be the same as that of Christ Jesus:
5 Your attitude should be the same as that of Christ Jesus:
6 Who, being in very nature God, did not consider equality with God something to be grasped,
7 but made himself nothing, taking the very nature of a servant, being made in human likeness.
8 And being found in appearance as a man, he humbled himself and became obedient to death—even death on a cross!
9 Therefore God exalted him to the highest place and gave him the name that is above every name,
10that at the name of Jesus every knee should bow, in heaven and on earth and under the earth,
11 and every tongue confess that Jesus Christ is Lord, to the glory of God the Father.
[Context is crucial in understanding this passage. This is not an isolated theological statement about the person and work of Christ. The previous paragraph (2:1-4) contains Paul's appeal to put aside selfish ambition and the pursuit of empty glory and to embrace self-sacrificial humility in the interests of others and with a view to unity in the body of Christ.
Verse 5 is a transition from the exhortation in vv. 1-4 to the premier example of such a life in vv. 6-11. When Paul says, "Have this attitude in yourselves," he has in view the attitude just described in vv. 1-4. The most perfect illustration of "this" attitude or mindset is Jesus himself ("which was also in Christ Jesus"), whose self-giving for the sake of others is explained by Paul.]
How do we or anyone else know what we think? It becomes readily apparent by what we say, what we feel, and what we do (actions). Many are confused about what they really think. One may assume that he thinks a certain way without realizing that it is very easy to mislead even oneself.
The ordinary mind is not one with God. What do you think about during your ordinary hours? Does God occupy much of your daily thinking? Does His will and His way lead you in your daily activities?
Paul points to the mind of Christ as the absolute model of what we should aspire to be. (5 Your attitude should be the same as that of Christ Jesus.)
Jesus existed as essentially one with God (vs 6). He existed in eternity before creation. He was identified with the being, nature, and personality of God. This form of God Christ laid aside in His incarnation.
He, in fact, thought it a thing not be be grasped.