The word if in this verse is not a condition, it brings with it the same meaning of the word since. As Christians we have been risen with Christ, and received the new life and the power to live it — and we should apply that power in our life everyday!
The secret to a godly life is simple: it relies on a proper relationship with Christ. A relationship that is dependent upon the power of God that ushers us into this new life. We must understand a godly life does not come from following a set of rules and observances, for that would depend on our own strength, and when we begin to compare our strength and ability with the strength and ability of God, we will always come up short.
We are exhorted here to seek those things above. The word seek brings with it an urgency, a desire and ambition, an excitement about spiritual things: those things above, or those things that pertain to Christ or apply to the Christian life. Things such as love, joy, peace, compassion, mercy, holiness, etc. Shouldn’t we be excited about these things and show urgency in demonstrating them in our own lives?
"Lay not up for yourselves treasures upon earth, where moth and rust doth corrupt, and where thieves break through and steal: But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal: For where your treasure is, there will your heart be also (Matthew 6:19-21)."
Let me say that this whole idea of living a godly life is exciting, profitable and bears eternal returns! I pray that we will have real and earnest joy and excitement for the things of God. If not, may we repent and be renewed so that we can begin to live the life God intended for us to live.
Live by faith, walk in His Spirit, seek those things above and have a GREAT day!