Stand in what...?
'Therefore, stand! Have the belt of truth buckled around your waist, put on righteousness for a breastplate, and wear on your feet the readiness that comes from the Good News of shalom.' - Eph.6:14-15 (CJB)
When a battle arises, we won't be shaken because our equilibrium is in perfect balance in Christ, The Truth.
By daily sitting in His presence, we are able to get up and walk in the Spirit (Gal.5:16, 18 & 21c) to inherit the Kingdom of God here on Earth!
And His Kingdom is a Kingdom of Shalom... (Rom.14:17).
Shalom means 'peace, harmony, wholeness, completeness, prosperity, welfare and tranquility'.
We can only stand in the spirit realm, against the Evil One, by securing our spirit-man through the Spirit of Truth (John 15:26) by having the mind of Christ filled by His Shalom (Rom.8:16).
Truth + Shalom = Standing in Christ