'Firm' in the Bible

For the Lord will be your confidence, firm and strong,And will keep your foot from being caught [in a trap].

Take hold of instruction; [actively seek it, grip it firmly and] do not let go.Guard her, for she is your life.

When He made firm the skies above,When the fountains and springs of the deep became fixed and strong,

She equips herself with strength [spiritual, mental, and physical fitness for her God-given task]And makes her arms strong.