Blackberries grow wild among brambles, so they are read as rewards gathered from difficult ground. Folk tradition also ties them to late summer and the turn toward autumn.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.