Believers Conduct

[1 Pet. 1:13] Wherefore gird up the loins of your mind, be sober, and hope to the end for the grace that is to be brought unto you at the revelation of Y’Shua HaMashiach;
[14] As obedient children, not fashioning yourselves according to the former lusts in your ignorance:
[15] But as he which hath called you is holy, so be ye holy in all manner of conversation;
[16] Because it is written, Be ye holy; for I am holy.
[17] And if ye call on the Father, who without respect of persons judgeth according to every man's work, pass the time of your sojourning here in fear:
Therefore gird up the loins of your mind: Living the way G-d wants us to means that we must gird up the loins of our mind. The idea in this phrase is of preparing for action, much like our phrase "rolling up your sleeves." We are to have our minds in constant preparation to discharge the duties, or to endure the trials of life--like those who were prepared for labor, for a race, or for a conflict.
Then, we must also be sober, which means the ability to take a serious look at life. Sobriety is, spiritual self-restraint, lest one be overcome by the allurements of the world and of sense, and patient hopeful waiting for Messiah’s revelation, is the true ways of "girding up the loins of the mind."
Hope to the end "perfectly," so that there may be nothing lacking in your hope, no casting away of your self-confidence. Hope so perfectly as to reach unto the end of your faith and hope, namely, "the grace that is being brought unto you in the revelation of Messiah.
We are not to become faint or weary in our trials, and however much might be done by others to induce us to apostatize.
From sobriety of spirit and endurance of hope Peter passes to obedience, holiness, and reverential fear.
As obedient children conduct yourselves as becomes the children of G-d, by obeying His commands; by submitting to His will; and by manifesting unwavering confidence in Him as your Father, at all times.
Not forming or modeling your life after the world. The idea is that they were to have some model or example, in accordance with which they were to frame their lives, but that they were not to make their own former principles and conduct the model. The Believer is to be as different from what he was himself before conversion as he is from his fellow-men. He is to be governed by new laws, to aim at new objects, and to mould his life in accordance with new principles. When you were ignorant of the requirements of the gospel, and gave yourselves up to the unrestrained indulgence of your passions.
But as He who called you is holy, you also be holy in all your conduct, because it is written, "Be holy, for I am holy": The main idea behind holiness is not moral purity but it is the idea of "apartness." The idea is that G-d is separate, different from His creation, both in His essential nature and in the perfection of His attributes. But instead of building a wall around His apartness, G-d calls us to come to Him and share His apartness. He says to us, "Be holy, for I am holy”. Holiness is not so much something we possess, as it is something that possesses us.
And if you call on the Father: If we, as Believers, call on a holy G-d, we must understand we call on a G-d who shows no partiality - and will so judge our conduct, making a working, sober, holy walk all the more important.
Fear is reverential, not slavish. He who is your Father, is also your Judge--a thought which may well inspire reverential fear.
A double fear is mentioned in Scripture:
1. Elementary, causing one to become serious;
2. Perfective: the latter is here the motive by which Peter urges them as sons of
G-d to be obedient. Fear is not here opposed to assurance, but to carnal security: fear producing vigilant caution lest we offend G-d and backslide. "Fear and hope flow from the same fountain: fear prevents us from falling away from hope". Though love has no fear IN it, yet in our present state of imperfect love, it needs to have fear going Along with it as a subordinate principle. This fear drowns all other fears. The believer fears G-d, and so has none else to fear. Not to fear G-d is the greatest baseness and folly. The martyrs' more than mere human courage flowed from this.
The high call for godly living makes sense in light of the price that was paid for our redemption. We weren't saved by the precious blood of Y’Shua to then live as if we were garbage.