Strength was not promised in advance–enough for all of life, or even for a year, or for a month. The promise was, that for each day, when it came with its own needs, duties, battles, and griefs–enough strength would be given. As the burden increased–more strength would be imparted. As the night grew darker–the lamps would shine out more brightly.
The important thought here is, that strength is not emptied into our hearts in bulk–a supply for years to come–but is kept in reserve, and divinely given day by day, just as the day’s needs require.
“Give us this day our daily bread.” Matthew 6:11
“On the day I called, You answered me; You increased strength within me!” Psalm 138:3
J.R. Miller “The Shining Light” 1911