Do you have any scripture memorized?
I figure memorization of scripture could be very spiritually strengthening. Do you agree?
No. I wish I could at least remember some good Sanskrit and Urdu verses. They are loaded with meaning and it is such a delight to come across them. What I remember can be counted on fingers.
But memorizing scriptures in the correct way was and is just a part of traditional education. Remembering 700 verses of Gita was no big deal, but think of remembering and instant recapitulation of 10,600 verses in 1028 hymns of RigVeda (with proper pronunciation) takes many years of practice. The people who can do this were known as 'Dvivedis' (since hymns of RigVeda and SamaVeda are nearly the same). Those who could remember YajurVeda in addition to the two were known as 'Trivedis', and the 'ChaturVedis' remembered all the four Vedas by heart. We have a finely developed technique to do that.
Vedic chant - Wikipedia
Memorizing is essential for scriptural debates that Hindus delight in. There are techniques to remember very long numbers and techniques to do quick calculations (now known as Vedic Mathematics). Then there are challenges. Like one stanza is spoken and the contestants are asked to complete the verse (happens in Urdu poetry also). Then there are competitions of creating extempore poetry. People who can do this are known as 'Ashu Kavis'.
Then deep knowledge of grammar. They have full command on words and the use of them. All this was and is a part of 'Shiksha' (Education), one of the six additional disciplines of Vedic studies.