Diluting grain alcohol is crucial for creating enjoyable and safe cocktails, due to its high alcohol content. To dilute it safely, start by deciding the desired strength of your final cocktail or infusion. Use water or another non-alcoholic base liquid to reduce the alcohol by volume (ABV) to a manageable level, typically around 20-40% for infused spirits and even lower for direct cocktail mixing. It's essential to measure accurately using a jigger or measuring tool and to mix thoroughly to ensure even dilution. Always taste your mixture as you go, adjusting the dilution to achieve the desired balance and flavor profile without overwhelming the drink with alcohol.