(J.R. Miller, "The Shining Light" 1911)
"As your days — so shall your strength be!" Deuteronomy 33:25
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