Perhaps you could look upon "fear and trembling" to seek not to grieve the Holy Spirit, having care in our walk to show a proper respect for our Holy Creator as best we know how to do, as opposed to being vainglorious creatures of the flesh,
Ephesians 4:30 And do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption.
In any event, have joy in your salvation and look forward to His appearing, knowing He has saved you. Trust Him completely in this regard, just praise His holy name Jesus, in that joy!
I like what was said here, especially in line with OP question. Fear and trembling, I perceive as handling the word and doctrine according to design and being mindful of what God is instructing for our work/house/building. We really want to do good and right, but sometimes, if we go off course and establish something carnally, we have to recover ourselves and hopefully we come back to the project and tear down the "wood, hay, stubble" we've built into our house of doctrine, then rebuild it according to God's plan(and His will). The "gold, silver, precious stones" are part of the inheritance and eternal glory God puts on display in the heavenly places, "the kingdom of His dear Son".
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15 [/SUP]Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
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9 [/SUP]For we are labourers together with God: ye are God's husbandry, ye are God's building.[SUP]
10 [/SUP]According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. But let every man take heed how he buildeth thereupon.
I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.[SUP]
2 [/SUP]And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.