"Let us not be weary in well doing: let us persevere in sowing to the Spirit. For in due season, when the harvest is come, we shall reap, if we faint not. ... The opportunity in general is our lifetime; but there are also many particular opportunities. Satan is quickened in doing hurt, by the shortness of the time. By the same consideration let us be quickened in doing good."
— John Wesley
Source: Explanatory Notes upon the New Testament, on Galatians 6:9–10