For example if you I drink water to fulfill thirst if you drink too much you may even die from water poisoning, if you drink too small amount you will hurt body too – while most people naturally can drink water without side effects when it comes to meditation is not the case, you doing random things with your mind which governs your body and life function, messing up with with it and randomly “toying” with meditation will hurt you long term. Proper meditation has little or no side effect and only positive results.
A Quest to Recover Buddha's True Teachings