Jesus told His disciples in Acts 1vs 8 that they will receive power after the HolySpirit comes on them. Then they can go forth to witness. He knew being a witness would be tough. It requires spiritual energy to overcome challenges and tantrums from the kingdom of darkness. Here, we are reminded that we have the source in us _ The HolySpirit. If you are struggling, maybe you are depending on your strength and need to return to the Spirit for fresh fire. God bless you.