We walk with our feet on the ground. We crawl with our belly to the earth and we roll side to side no matter which gave contact first.
Sometimes and working honestly with unstable structures such as sticks with round ends or people you can find support you can use from what others consider resistance or obstruction. For example your knife strike was blocked by a forearm which is supported by the body (working the movement gives more than you may consider) so you can use the pressure not as an obstacle but as a drive to the other side of the body to come in. On the other hand, forgive the pun, you can add to the pressure of the forearm by pulling the defending arm to you and by doing so removing the emotional defense the person in front of you has and allowing him to either ingest the blade if need be while working or learn and become a humbler more aware person.
Another example is working solo with a sturdy stick with a rounded end. You sit or lie on the ground and while holding onto the stick you move your hands from the body to the stick to lift you to the upright and then descend again down gently. Learning to give just what the moment requires, no more and no less. Getting one thing right and sticking to it is a sure way to failure. Do no cling to success or your study will be fruitless.