Think positive if you want to be happy in life

Life becomes easy if we keep our thinking always positive. Sometimes it becomes difficult but my life is its true example. There come hurdles in our way of progress and we become sad to get no way but if we think positive and we find no way to go ahead then definitely we can reverse the car of our life, and we should not feel ashamed over it.
Yesterday my mom in law came to my house to live here with us for a few days. Should I be happy or angry or worried over it? Some one may think that I,ll have to do extra chores of household, why should I welcome her with a broad smile? But I think she will be with us; no matter a little extra work but she loves us and this is her son's house and she loves as much as her son and her grand children and her bahoo(daughter in law i.e me) as I love my son and my bahoo (my daughter in law) n my grand children. Moreover she is in her 90s and need our extra care and I am in a position to do that so I feel pleasure in doing this. As a result I get her especial prayers for me n my family. sometimes she does bitter criticism in trivial matters, no worry she has become old and this is her habit. When she is in good mood she enjoys all things going around her, from children's mischiefs to TV commentary to maid's problem to beauties of nature. We keep her close to us in our daily life so she does not feel separated and remains happy at my place. In our culture most of the girls take mom in law as a curse but I do not think so. She is just like my real mother a blend of virtues and vices. And I take the whole matter like that.