Do not involve yourself in anything unless you have worked out a way on how to accomplish it.
Approaching a waterway without knowing how to swim in perilous, for one does know how deep it runs. Likewise, it is better not to get involved in anything without knowing the intricacies in advance and not having a ready solution to overcome any perils that may arise.
لا تقترب من الماء قبل أن تعرف كيف تسبح!!