Heart:  lev

Here is an example of our modern western culture still using a concrete object to express an abstract idea. We often associate the heart with emotions such as love and kindness as in "He has a good heart". This is also true with the Hebrews who saw the heart as the seat of emotion. But unlike us they also saw the heart as the seat of thought whereas we see the brain as the seat of thought. To the ancient Hebrews the heart was the mind including all thoughts including emotions. When we are told to love God with all our heart (Deut 6:5) it is not speaking of an emotional love but to keep our emotions and all our thoughts working for him. The first picture in this Hebrew word is a shepherd staff and represents authority as the shepherd has authority over his flock. The second letter is the picture of the floor plan of the nomadic tent and represents the idea of being inside as the family resides within the tent. When combined they mean "the authority within". 

Holy:  qadosh

When we use the word holy, as in a holy person, we usually associate this with a righteous or pious person. If we use this concept when interpreting the word holy in the Hebrew Bible then we are misreading the text as this is not the meaning of the Hebrew word qadosh. Qadosh literally means "to be set apart for a special purpose". A related word, qedesh, is one who is also set apart for a special purpose but not in the same way we think of "holy" but is a male prostitute (Deut 23:17). Israel was qadosh because they were separated by the other nations as servants of God. The furnishings in the tabernacle were qadosh as they were not to be used for anything except for the work in the tabernacle. While we may not think of ourselves as "holy" we are in fact set apart from the world to be God's servants and representatives.