For those who live according to the flesh think about the things of the flesh, but those who live according to the Spirit, about the things of the Spirit. For the mind-set of the flesh is death, but the mind-set of the Spirit is life and peace.
Romans 8:5‭-‬6 HCSB

I say then, walk by the Spirit and you will not carry out the desire of the flesh. For the flesh desires what is against the Spirit, and the Spirit desires what is against the flesh; these are opposed to each other, so that you don’t do what you want.  But if you are led by the Spirit, you are not under the law.
Galatians 5:16‭-‬18 HCSB

for if you live according to the flesh, you are going to die. But if by the Spirit you put to death the deeds of the body, you will live. All those led by God’s Spirit are God’s sons.  For you did not receive a spirit of slavery to fall back into fear, but you received the Spirit of adoption, by whom we cry out, “ Abba , Father! ”
Romans 8:13‭-‬15 HCSB

Therefore, brothers, by the mercies of God, I urge you to present your bodies as a living sacrifice, holy and pleasing to God; this is your spiritual worship. Do not be conformed to this age, but be transformed by the renewing of your mind, so that you may discern what is the good, pleasing, and perfect will of God. For by the grace given to me, I tell everyone among you not to think of himself more highly than he should think. Instead, think sensibly, as God has distributed a measure of faith to each one. Now as we have many parts in one body, and all the parts do not have the same function, in the same way we who are many are one body in Christ and individually members of one another.
Romans 12:1‭-‬5 HCSB

The main difference between the thoughts of those that are spiritual and those that are not, is they (the spiritual) are unselfish, truly unselfish in how they think. They focus on the Lord God and His glory and not on themselves (either their successes, failures or on selfish ambitions). In this way we see plays out what Jesus said that those who find their lives will lose it, but those that gave up their lives for Him (His purposes, His glory, His desires) will find it. He said that those that are not prepared to lay down their lives and follow Him are not worth Him. So to think not of yourself and how you measure up and what you want but to be a slave, a bondservant that lost your rights willingly and is now utterly and only concerned with the desires of your Master is a life lost unto self. In relation to people this manifest in a love for people birthed through joining in the heart of the Master for that person and selflessly desiring the best for others. Loving them not to achieve something, but rather out of a place of oneness with the Lord Jesus and honouring people for the important and unique place they are called for in the body of Christ with eyes to see. Eyes to see because of connectedness to Christ. Here we need to meditate on the content of John 17. And also on the words of Jesus, that we need to go learn what it means that He desires mercy and not sacrifice. To give to others as sacrifice just in order to earn points with God is not love. Because ultimately it is still about self. It is still the kind of dead works that 1 Cor 13 talks about where a person can give everything he has away to the poor and still not have love. Because God's kind of love is not a works program. Our connectedness to the vine is what allows us to bear fruit. Our oneness with Jesus and our living from that place is key to everything when it comes to fruitful living. Because wirhout Him we can do nothing. Our most important job is yielding to the Holy Spirit and getting our minds renewed so we can think right. Because as a man thinks in his heart so is he, and as he is, and he does.