This
simile means totally transparent, and can apply in both a literal and
figurative sense. Metaphorically it means either a clear sound of very easy to
understand. The literal version was used in the biblical test of Revelation 21:11, even in the Tyndale Version, first published in
1526, and seems to be the origin of the thought:
“Havyng the brightness of God. And her shynynge was lyke vnto a stone moste precious even a lasper cleare as cristall.”
The use of this comparison to sound came as early as 1740 in Memoirs: Being a New Abridgment of the Philosophical Transactions, by Benjamin Baddam, published by the Royal Society of Great Britain in London, on page 259:
“…but he sound
that those which had been as clear as crystal before,
had now lost a great deal of their transparency…”
Crystal-clear
is used to describe understanding by December, 1854, in an article titled ‘As
Clear as Crystal!’ which appeared in Punch,
or The London Charivari on page 44:
“LAING
delivers his Crystal-clear account of the directors’
stewardship…”
God
has made the way of salvation crystal clear. All we have to do is believe and
ask him into our hearts to be our Lord and Savior.