In my opinion, the answer for the question is reading or writing more effective to express our feelings is so clear and obvious. While writing, we can write anything that we think about and what do we feel on the paper, but when reading, even if we write the text by ourselves, our thoughts and The way of expressing ourselves can change by our feelings and thoughts at the moment.
Writing is a better way to express yourself than reading. As I told you at the beginning, while writing, we can write down our exact thoughts and our feelings at the moment. However, when reading, we are looking at something that was written before and in the past. Since our thoughts can change anytime, writing feels more honest than reading because it shows our current emotions. Also, reading can become more serious because of its pronunciation and diction, which can make it harder to express yourself freely.