The opposite of a scarcity mentality is an abundancy mentality. With an abundancy mentality we say: "There is enough for everyone, more than enough: food, knowledge, love ... everything." With this mind-set we give away whatever we have, to whomever we meet. When we see hungry people we give them food. When we meet ignorant people we share our knowledge; when we encounter people in need of love, we offer them friendship and affection and hospitality and introduce them to our family and friends.
When we live with this mind-set, we will see the miracle that what we give away multiplies: food, knowledge, love ... everything. There will even be many leftovers.