"Enduring energy, strength, and resilience" - Collins Dictionary
"Great physical or mental strength that allows you to continue doing something for a long time." - Brittanica
In his 83rd year, Wesley wrote in his diary: "I am a wonder to myself. I am never tired, either with preaching, writing or travelling."
Do you see what I mean? He must have been sipping some Red Bull on his horse :)
But seriously, the only thing he would put forward as a logical reason for his energy and stamina, would be the 'Grace of God' and the power of the Holy Spirit. You can't keep going like that, without the power of God's supernatural favour and grace.
1 Peter 4:11 - If anyone serves, they should do so with the strength God provides, so that in all things God may be praised through Jesus Christ. To him be the glory and the power for ever and ever. Amen.
Thought: Are you relying on your own strength at the moment, or are you trusting in the power of God's spirit? May God grant you his strength and grace today.
Living in Grace
D3LM3