In His public ministry, He never taught without using parables; but afterward when He (Jesus) was alone with His own disciples, He explained everything. (Mark 4:34)
God desires our fellowship. He wants us to be part takers of the good things that are found in His word. Although His word never goes out void, just like any relationship, if we only communicated with occasional, random texts, we would not have anywhere near the relationship that we would have by spending time alone with that person.
Through His word and prayer, we can know God intimately. It is where His truth comes alive in our soul.
When He was alone with His own, He explained everything.