'One's' in the Bible

The law of the Lord is perfect and preserves one's life. The rules set down by the Lord are reliable and impart wisdom to the inexperienced.

For his anger lasts only a brief moment, and his good favor restores one's life. One may experience sorrow during the night, but joy arrives in the morning.

would not God discover it, for he knows one's thoughts?

The days of our lives add up to seventy years, or eighty, if one is especially strong. But even one's best years are marred by trouble and oppression. Yes, they pass quickly and we fly away.

Sons born during one's youth are like arrows in a warrior's hand.