Yes ,sharing is a Christian principle see Luke 6:38. Part of sharing here is spiritual as well as physical. See verses 39 and 40. There are different motives for sharing. It is really part of our self interest that we share. Not only is there returned blessing from God but sharing is a wise and sometimes defensive move. Giving to the indigent and helping a man to get skills helps us to live without seeing our friend suffer in some cases going to a hospital or prison. Allowing the animals to have the low hanging fruit is another example. On a market we do not completely share; however, both parties benefit when an exchange is made. In fact because of unequal distribution of resources including weather and talents (division of labor) exchange (free trade) is necessary. When monopoly privileges and regulations are eliminated prices go toward zero (to the labor's idea of his value). Mutual aid societies when allowed enable consumers to pool their buying power (i.e) against monopoly hungry doctors further reduces prices. Open source ecology (see www.opensourceecology.org/wiki/Global-Village-Construction-Set) enables others to receive the blessing of technological advances. They can use their talents with these open source technologies to produce needed products for the market so to increase the supply of products which we need to buy. With these sharing becomes easier (reduced prices). We then approach Stigmergic Socialism.
Sharing and giving are normal for all peoples regardless of religions. The capitalist creed of competition is a perversion. We must remember Corporatism and its private property capitalist ideology is intended to divide and destroy our peoples into warring camps. Conflating Capitalism with free markets has been one of their methods to divide.
Give and it shall be given to you. Good measure, pressed down, shaken together and running over, will be put into your lap. For with the measure it will be measured to you in return. luke6:38