Romans 12:1 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.

2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God. KJV

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It is hard for this to happen when we have so many sacred cows and traditions of men that we refuse to challenge especially if they are fun or hold fond memories. Sacred cows must be sacrificed if we are to be transformed. Traditions that are not truth must be trashed if we are to prove what is good, acceptable and perfect. It is not easy, but necessary, if we hope to be that holy and acceptable living sacrifice to perform our reasonable service even if it seems unreasonable to our mind or even breaks our heart.