Christian workers can never attain the highest success until they learn the secret of strength. They must give themselves time to think, to pray, to wait upon God for a renewal of physical, mental, and spiritual power. They need the uplifting of His Spirit. Receiving this, they will be quickened by fresh life. The wearied frame and tired brain will be refreshed, the burdened heart will be rested.—Letter 1, 1904. (HP 83.4) MC VC