Writing, or expressing God's heart for someone through written words, is just another way He reveals himself to people. Words have meaning and God chooses His words with intention.
His words are personal. They initiate change. They evoke faith and hope on a deeper level. They can also illuminate His purpose to the hearer by disclosing and making known what was once hidden or unknown.
Those words invite the recipient into deeper places with Him.
No two written expressions are alike.
Each expression is tailor-made for the person or group of people receiving it.