God’s “Other Than-ness” (Holiness) Pt.2

1 Peter 1:14-16 As obedient children, do not be conformed to the passions of your former ignorance, but as he who called you is holy, you also be holy in all your conduct, since it is written “You shall be holy, for I am Holy”. What does it mean to be holy, and how do we obey God’s commandment to be holy?