of colo in the sense of habito and diligo .
 
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“ Ich bin ” ( I am ) means I dwell, I stay near .
 
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the world as something familiar in such and such a way. Being as the infinitive of “ I am ” : that is, understood as an existential means to dwell near .
 
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to be familiar with .
 
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Being-in is thus the formal existential expression of being of Da-sein which has the essential constitution of being-in-the-world. ( BT 51 [ 54 ] ; italics and ellipses original ) 12 Da-sein ’ s being in the world comprises more than its physical existing in the world, but also its existential connection to the world. This connection is expressed in its not simply dwelling in, but dwelling “ near, ” the world ; and it is not simply being put next to the world ( like two independent entities ) , but becoming “ familiar with ” it. To be near and to become familiar with the world, Da-sein has to “ take care of ” it. Without this concernful involvement in the world, Da-sein cannot be said of being-in-the-world because