It should, however, be observed that even when it is beyond our power to realise virtue immediately at will, we recognise a duty of cultivating it and seeking to develop it: and this duty of cultivation extends to all virtuous habits or dispositions in which we are found to be deficient, so far as we can thus increase our tendency to do the corresponding acts in future; however completely such acts may on each occasion be within the control of the will. It is true that for acts of this latter kind, so far as they are perfectly deliberate, we do not seem to need any special virtuous habits; if only we have knowledge of what is right and best to be done, together with a sufficiently strong wish to do it.[181] But, in order to fulfil our duties thoroughly, we are obliged to act during part of our lives suddenly and without deliberation: on such occasions there is no room for moral reasoning, and sometimes not even for explicit moral judgment; so that in order to act virtuously, we require such particular habits and dispositions as are denoted by the names of the special virtues: and it is a duty to foster and develop these in whatever way experience shows this to be possible. The complicated relation of virtue to duty, as above determined, must be borne in mind throughout the discussion of the particular virtues, to which I shall proceed in the following chapters. But, as we have seen, the main part of the manifestation of virtue in conduct consists in voluntary actions, which it is within the power of any individual to do--so far as they are recognised by him as right,--and which therefore come within our definition of Duty, as above laid down; it will not therefore be necessary, during the greater part of the ensuing discussion, to distinguish between principles of virtuous conduct and principles of duty; since the definitions of the two will coincide.