"The graciousness of uncertainty"

one of my favorites from Oswald Chambers' "My Utmost for His Highest"

He quotes 1 John 3:2b but I like both verses one and two:
See how great a love the Father has bestowed on us, that we would be called children of God; and such we are. For this reason the world does not know us, because it did not know Him. Beloved, now we are children of God, and it has not appeared as yet what we will be. We know that when He appears, we will be like Him, because we will see Him just as He is.

Naturally, we are inclined to be so mathematical and calculating that we look upon uncertainty as a bad thing. We imagine that we have to reach some end, but that is not the nature of spiritual life. The nature of spiritual life is that we are certain in our uncertainty, consequently we do not make our nests anywhere. Common sense says - "Well, supposing I were in that condition..." We cannot suppose ourselves in any condition we have never been in.
Certainty is the mark of common-sense life: gracious uncertainty is the mark of spiritual life. To be certain of God means that we are uncertain in all our ways, we do not know what a day may bring forth. This is generally said with a sigh of sadness; it should be rather an expression of breathless expectation. We are uncertain of the next step, but we are certain of God. Immediately we abandon to God, and do the duty that lies nearest, He packs our life with surprises all the time. When we become advocates of a creed, something dies; we do not believe God, we only believe our belief about Him. Jesus said, "Except ye... become as little children." Spiritual life is the life of a child. We are not uncertain of God, but uncertain of what He is going to do next. If we are only certain in our beliefs, we get dignified and severe and have the ban of finality about our views; but when we are rightly related to God, life is full of spontaneous, joyful uncertainty and expectancy.
"Believe also in Me," said Jesus, not - "Believe certain things about Me." Leave the whole thing to Him, it is gloriously uncertain how He will come in, but He will come. Remain loyal to Him.

why be holy?

I know in this Christian walk we will be sanctified. We are to strive towards holiness and godliness. We are to be like Christ. We are to love, to fight sin, to trust in God, to be a light in the world, etc. But why? I don't know why I asked the "why" question because I know that these are fruits of a believer. We were created to worship and do good works. I sound like I don't believe because I ask the why question. Thinking about it more, it cannot be merely because it's fruit of a Christian or even because we will be rewarded. Then I was reminded that it's because.... God loves me. Somehow it makes sense. His love controls me. (2 Cor 5:14)

But God being rich in mercy, because of His great love with which He loved us, even when we were dead in our transgressions, made us alive together with Christ (by grace you have been saved)
Ephesians 2:4-5