John was on assignment from God. The "word of God" means God's word of course, but it also means (according to the Greek) reason, cause, as assigned.
We are all on assignment in this war between Good and evil.
The evil side has power in some places, but Good will always win if we do what we are called to do. A tiny light will penetrate the darkest of darks.
Where you are in this life, physically and situationally, is your assignment from our Heavenly Commander. It is deliberate. Where you are is where God can use you best.
Find strength in that.
Find purpose in realizing that God has placed you where you are strategically for His Kingdom Purposes.
Some of the key strategies of the enemy are to use discouragement, stress and negativity to get you off track, to get you to quit being aware of who you are in Jesus and how powerful you actually are in Him. The enemy will also use the things of this world to lead you into numbness and apathy toward the needs of others.
God is never apathetic.
God is never numb toward needs.
God is Perfect Compassion.
God is Perfect Peace and Love.