"Love looks not with the eyes but with the mind."-Helena
Helena says to Lysander that most people see what they want to see with the mind rather then seeing what is to be seen.
"We should be woo'd and were not made to woo"
Helena is explaining that she should not be pursuing a man, Demetrius. Men should pursue women and not the other way around.
"Our remedies oft in ourselves do lie"
The solutions to our problems, often lay in ourselves. In other words, we solve our own problems.