A highly storage-stable organopolysiloxane composition capable of the long-term retention of its surface-modifying activities, such as antistatic and anticlouding activities is disclosed. The composition comprises a first polyoxyalkylene-functional diorganopolysiloxane that is free of amino, carboxyl, and epoxy groups, a second polyoxyalkylene-functional diorganopolysiloxane that contains an amino-functional organic group, and water.