The only definition of the indefinable Divine is He/She/That is bliss. If you are in bliss you are with God. If you are with your mind and its random thoughts then you may slip into mixed emotions and its consequences. Hence, to be spiritual is to be awake to the reality that you are in God and God is in you, all else is transient. God is love and bliss, to be God loving is to be in love and bliss.
Shuddhaanandaa Brahamchari