46 The hope for life after death is supported now by a description of the severity with which God deals with people in this life.
47 If v. 16a continues the previous series, the translation here would be “then” (as in ). Others take it as a new beginning to express God’s present watch over Job, and interpret the second half of the verse as a question, or emend it to say God does not pass over his sins.
48 Compare Ps 130:3–4, which says, “If you should mark iniquity O Lord, Lord, who could stand? But with you there is forgiveness, in order that you might be feared.”
49 The second colon of the verse can be contrasted with the first, the first being the present reality and the second the hope looked for in the future. This seems to fit the context well without making any changes at all.

In other versions

For then you would number my steps;

you would not keep watch over my sin;

Surely then you will count my steps

but not keep track of my sin.

For then you would count my steps

but would not take note of my sin.

For then you would guard my steps,

instead of watching for my sins.

For then you would count my steps,

but you would not keep watch over my sin.

For now thou numberest my steps:

Dost thou not watch over my sin?

Public Domain

Job 14:16